Azure Function + Apollo GraphQL + Cosmos MongoDB Shard Key.ts

import { ApolloServer, gql } from 'apollo-server-azure-functions'
import * as mongoose from 'mongoose'
import { schema } from './model'

mongoose.connect(process.env.COSMOSDB_CONNSTR, {
    useUnifiedTopology: true,
    useNewUrlParser: true,
    auth: {
        user: process.env.COSMODDB_USER,
        password: process.env.COSMOSDB_PASSWORD,
    },
})
.then(() => {
    try {
        mongoose.connection.db.admin().command({
            shardCollection: 'MyDB.MyCol1',
            key: { myPartionKey: 'hashed' },
        })
    } catch (err) {
        console.log(err)
    }

    try {
        mongoose.connection.db.admin().command({
            shardCollection: 'MyDB.MyCol2',
            key: { myPartionKey: 'hashed' },
        })
    } catch (err) {
        console.log(err)
    }
    console.log('Connection to CosmosDB successful 🚀')
})
.catch((err) => console.error(err))

const server = new ApolloServer({
    schema,
    playground: {
        settings: {
            'editor.theme': 'dark',
        },
    },
},
)

exports.graphqlHandler = server.createHandler({
    cors: {
        origin: true,
        credentials: true,
    },
})